<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>轮播图</title>
    <style>
        .lbt{
            height: 500px;
            width: 800px;
            margin: auto;
            background-image: url(../xbox/img/10.jpg);
            background-size: 100%;
            background-repeat: no-repeat;
            animation: lbt 8s infinite;
        }
        @keyframes lbt{
            25%{
                 background-image: url(../xbox/img/13.jpg);
            }
            50%{
                background-image: url(../xbox/img/8.jpg);
            }
            75%{
                background-image: url(../xbox/img/15.jpg);
            }
        }
    </style>
</head>
<body>
    <div class="lbt"></div>
</body>
</html>